<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta name="viewport" content="width=device-width,initial-scale=1"/>
   
    <meta charset="UTF-8"/>
    <script src="/js/ajaxupload.js"></script>
    <title>hello world</title>
</head>
<body>
    <div class="panel panel-primary">hi, 
    <span th:text="${str}"></span>
    </div>
    
    </body>
    </html>